JPH0314480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a single-tub type dehydrating washing machine. This type of dehydrating washing machine performs washing, rinsing, and dehydration in the same washing and dehydrating tank, so when washing and rinsing, the washing and dehydrating tank is stopped and the pulsator installed at the bottom is rotated. Stop the pulsator and rotate the washing/dehydrating tank at high speed. If the rotation of this pulsator and the rotation of the washing/dehydration tank are made the same speed, the drive device will be simpler, but the washing/dehydration tank requires a rotation speed of around 900 rpm to increase the dehydration efficiency, and the pulsator may damage clothes. A rotation speed of around 300r.pm that does not cause damage is appropriate.

A first means for obtaining these two types of rotation speeds is to use two motors with different rotation speeds, or to convert and switch the number of poles of one motor. However, when two motors are used, the number of attached parts increases, making the overall structure of the drive device larger and more complicated. Further, when a pole number changing motor is used, the motor itself becomes larger and two belts having different speeds are used, so that slips are likely to occur when the tension of these belts changes.

A second means of obtaining two different rotational speeds consists in using a multi-stage gear reducer. but,
Conventional multi-stage gear reducers are generally noisy and
Furthermore, since the meshing of the gears requires precision work, productivity is low, and service disassembly requires a skilled person. For this reason, the present inventors have already developed a speed reduction mechanism using planetary gears as a speed reduction mechanism in place of the multi-stage gear speed reducer. Hereinafter, a driving device for a dehydrating washing machine equipped with a speed reduction mechanism made of planetary gears will be explained with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes an outer tub of a dehydrating washing machine, and a top plate 2 and a panel box 3 are attached to the upper opening of the outer tub. 4 is a cover plate. Reference numeral 5 denotes a water tank, which has a support plate 6 at the bottom, and a buffer pipe 7 at the tip of the support plate 6.
It is resiliently suspended from the outer tank 1 by a hanging rod 8 to which a hanging rod 8 is attached. Reference numeral 9 denotes a washing and dehydrating tank housed inside the water receiving tank 5, which is equipped with a pulsator 10 at the bottom, a balancer 11 at the top, and a dehydrating hole 12 in the peripheral wall. 13 is a drive device fixed to the support plate 6, 14
Similarly, a motor pulley 15 and a drive pulley 16 are connected by a belt 17.
18 is a motor cooling fan.

Next, the structure of the drive device 13 will be explained with reference to FIG. The drive pulley 16 is fixed to a pulley boss 20 by a bolt 19, and the pulley boss 20 is connected to a washing drive shaft 22 by a spring pin 21. The washing drive shaft 22 is rotatably supported inside a hollow dehydration drive shaft 24 by a bearing 23. The dewatering drive shaft 24 is rotatably supported by a bearing 26 in a case 25 of the drive device 13, and is connected to the pulley boss 20 via a clutch spring 27. The upper end of the dehydration drive shaft 24 is fixed to a gear case 28 that functions as a brake drum, and a dehydration tank shaft 31 is fixed to a cover flange 30 fixed to the gear case 28 with screws 29. is rotatably supported by the case cover 33 of the drive device 13.

As shown in FIG. 3, the washing drive shaft 22 has a serration 22' at its upper end, and a sun gear 3.
4 are fixed by serrations 34'.
It is arranged around the sun gear 34. Outer ring gear 35
is fixed inside the gear case 28 with screws 36. 35' is a screw hole. Outer ring gear 3
5 and the sun gear 34, there are a plurality of (four) planetary gears 37 that mesh with these, and the planetary gears 37 are connected by a shaft 40 between an upper holding plate 38 and a lower holding plate 39. It is rotatably supported. 41
is a retaining ring that prevents movement of these gear groups in the axial direction (vertical direction). The pulsator shaft 42 is rotatably supported inside the dehydration tank shaft 31 by a bearing 43, and its lower end forms a serration 42' and is connected to the serration 38' of the upper holding plate 38.

Referring again to FIG. 2, the pulsator 10 is fixed to the upper end of the pulsator shaft 42 with screws 44, and the bottom plate 45 of the washing and dehydrating tank 9 is fixed to the dehydrating tank shaft 31 with a nut 46. 47 is a clutch gear which releases the pulley boss 20 from the dewatering drive shaft 24 during washing and rinsing, and connects the washing drive shaft 2 to the washing drive shaft 24.
2, and at the time of dehydration, the pulley boss 20 is released from the washing drive shaft 22 and connected to the dehydration drive shaft 24. Numeral 48 is a brake spring that comes into sliding contact with the surface of the gear case 28, and 49 is a clutch spring that comes into contact with the base of the cover flange 30, which brakes the rotation of the gear case 28, that is, the rotation of the dehydration tank shaft 31 during washing and rinsing, and brakes the rotation of the dehydration tank shaft 31 during dehydration. release. 50 is gear case 28 and cover flange 30
This is an O-ring that keeps the connection part watertight.

In the above configuration, during dewatering, the motor 14 rotates by the motor pulley 15, belt 17, drive pulley 16, pulley boss 20, and clutch spring 2.
7. It is transmitted to the dehydration tank shaft 31 via the dehydration drive shaft 24, gear case 28 and cover flange 30, and gives the washing dehydration tank 9 a rotation of around 900 rpm. During washing and rinsing, the rotation of the motor 14 is controlled by the motor pulley 15, belt 17, and drive pulley 1.
6. It is transmitted to the pulsator shaft 42 through the pulley boss 20, spring pin 21, washing drive shaft 22, sun gear 34, planetary gear 37 and upper support plate 38, and rotates the pulsator 10. Planetary gear 3
7, the number of teeth of the sun gear 34 is A,
If the number of teeth of the outer ring gear 35 is B, then S=
It becomes 1/1+B/A. Now, if A=36 and B=76, S=1/3·11, and when the rotation speed of the dehydration tank shaft 31 is 900 rpm, the rotation speed of the pulsator shaft 42 will be about 290 rpm.

The speed reduction device using planetary gears has a sun gear 34 and a plurality of planetary gears 37 held by an upper holding plate 38 and a lower holding plate 39, and is unitized as one component. Assembly productivity and serviceability are far superior to reduction gears consisting of a multi-stage reduction gear group.
The present invention provides an outer ring gear 35, a gear case 28, and a cover flange 30 of a reduction gear device using planetary gears.
The purpose of this invention is to further improve the advantages of the planetary gear reduction device by simplifying and rationalizing the structure of the part. Examples thereof will be described below with reference to the drawings.

[Example] In Fig. 4, 51 is the dehydration drive shaft 2 of Fig. 2.
The lower coupling has a cylindrical portion 51a corresponding to No. 4 and a flat portion 51b corresponding to the bottom surface of the gear case 28. 52 is an upper coupling corresponding to the cover flange 30 in FIG. A gear case is constructed by interposing a cylindrical brake drum 54 having an integral outer gear 53 on its inner peripheral surface between the upper and lower coupling rings 51 and 52 and fixing it with a plurality of pins 55. Ru. A brake ring 56 (FIG. 9) having an L-shaped cross section is fixed to the outer peripheral surface of the brake drum 54, and the brake shoe 48 is in sliding contact therewith. Other structures are the same as the conventional device shown in FIG. It should be noted that if a stepped portion is provided at the joint portion between the brake drum 54 and the upper and lower coupling rings 51, 52 for spigot jointing, the accuracy of assembly can be increased.

[Example] In Fig. 5, 57 is the dehydration drive shaft 2 of Fig. 2.
This is a lower coupling having a cylindrical part 57a fixed to the gear case 28 and a flat part 57b corresponding to the bottom surface of the gear case 28. Reference numeral 58 denotes an upper coupling corresponding to the cover flange 30 shown in FIG. 2, and the feature of this embodiment is that the upper coupling 58 and the lower coupling 57 are made to have the same shape and size. Reference numeral 59 denotes a rib provided on the flat surface of the upper and lower coupling rings, which regulates the position of the inner circumferential surface of the brake drum 54. The brake drum 54 integrally has an outer gear 53 on its inner peripheral surface, is fixed to upper and lower coupling rings 58 and 57 by a plurality of pins 55, and has a brake ring 56 attached to its outer peripheral surface;
And other structures are the same as those of the embodiment.

FIG. 6 shows another embodiment of the brake drum.
This brake drum 60 is made of synthetic resin, has an integral outer ring gear 53 on its inner peripheral surface, and has a recess 61 in its outer peripheral surface into which a brake ring (FIG. 9) 56 is fitted. 62 is a protrusion provided on the upper and lower end faces of the protrusion, and after inserting it into the pin hole provided in the upper coupling ring 58 and the lower coupling ring 57,
This brake drum 60, which is crushed and fixed by means such as heat welding, can omit the fixing pin 55 of the embodiment.

FIG. 7 shows another embodiment of the brake drum.
The brake drum 63 is made of a wear-resistant material with a high coefficient of friction, such as rubber-containing plastic. Therefore, brake ring 5
6 can be omitted, and the brake shoe 48 can be simplified. The outer ring gear 53 is integrally formed on the inner peripheral surface and is fixed to the upper and lower coupling rings 58, 57 by pins 55, as in the embodiment.

FIG. 8 shows an embodiment of a metal fitting (pin) for fixing the brake drum between the upper and lower coupling rings 58, 57. The brake drums shown in FIGS. 4, 5, and 7 are fixed by caulking both ends of a round bar pin 55, but if a stepped pin 64 as shown in A is used, more precision can be achieved. Can be highly fixed. There are two ways to fix it: caulking both ends, and cutting the threads and tightening them with bolts.

FIG. 9 shows an example of a brake ring 56 that is attached to the sliding surface of the brake shoe 48 of the brake drum shown in FIGS. Become,
Brake drum outer circumferential surface and lower coupling ring 57
installed in close contact with the brake drum to prevent wear and tear on the brake drum. Reference numeral 65 is a mounting hole to which the pin 55 is fixed.

As described above, the drive device for the dehydrating washing machine of the present invention has the washing drive shaft 22 inside the hollow dehydration drive shaft 24, and the washing drive shaft 22 has the sun gear 34 at its tip. A plurality of planetary gears 37 are provided between the sun gear 34 and an outer ring gear 35 disposed around the sun gear 34, and a plurality of planetary gears 37 that mesh with these gears are connected, and a pulsator shaft 42 is connected to the planetary gears 37 to constitute a washing drive system. A gear case for accommodating and holding the group is combined with the dehydration drive shaft 24 and the dehydration tank shaft 31 to constitute a dehydration drive system, and the gear case is connected to the upper coupling 52 connected to the water tank shaft 31 and its inner peripheral surface. a cylindrical brake drum 54 that integrally has an outer gear 53 and has a brake shoe 48 in sliding contact with its outer peripheral surface;
The dewatering drive shaft is coupled to a lower coupling 51 integrally formed, the upper coupling 58 and the lower coupling 57 having the same shape and the same size, and the upper coupling , the brake drum and the lower coupling are round pins or stepped pins 64.
(Fig. 8) and the like, and a brake ring 65 (Fig. 9) made of a wear-resistant material with a large coefficient of friction is fixed to the outer peripheral surface of the brake drum. The brake shoe 48 is configured to come into sliding contact with the brake ring 65. Further, the brake drum is made of synthetic resin, and a projection 62 (sixth projection) is formed on the upper and lower end surfaces of the brake drum and is inserted into pin holes provided in the upper coupling ring and the lower coupling ring and bonded by thermocompression.
The brake ring 65 can be integrally provided with the brake ring 65, thereby omitting mounting fittings such as the pins, and the brake drum itself may be made of a wear-resistant material with a high friction coefficient, such as rubber-containing plastic. It is also possible to have a structure (FIG. 7) in which .

The present invention has the following effects due to the above configuration.

Since the washing shaft and the dehydrating shaft are arranged concentrically and connected by a planetary gear system, assembly of the drive system is easy.

Since the outer ring gear is integrally formed on the inner peripheral surface of the brake drum, the work of fixing the outer ring gear can be omitted.

The outer ring gear that also serves as a brake drum can be easily formed by punching in the vertical direction.

[Brief explanation of the drawing]

Fig. 1: A longitudinal cross-sectional view of a dehydrating washing machine equipped with the drive device of the present invention, Fig. 2: A longitudinal cross-sectional view of a conventional drive device, Fig. 3: A diagram showing the speed reducer in Fig. 2,
A is a side sectional view, B is an XY line sectional view of A, Figure 4:
FIG. 5 is a vertical sectional view of the drive device (embodiment) of claim 1; FIG. 6 is a longitudinal sectional view of the drive device (embodiment) of claim 2; FIG. 6 is an embodiment of the brake drum; 7 is a partial perspective view, B is an assembled view, and
Figure: Longitudinal sectional view of another embodiment of the brake drum, Figure 8: A diagram showing the stepped pin, A is a side view, B is an assembled diagram, Figure 9: A diagram showing the brake ring, A is a partial view. Plan view, b is an XY cross-sectional view. Symbol 1... Outer tank, 2... Top plate, 3... Panel box, 4... Lid plate, 5... Water receiving tank, 6... Support plate, 7... Buffer pipe, 8... Hanging rod, 9 ...Washing dehydration tank, 10...Pulsator, 11...Balancer, 1
2... Dehydration hole, 13... Drive device, 14... Motor, 15... Motor pulley, 16... Drive pulley, 17... Belt, 18... Fan, 19...
Bolt, 20... Pulley boss, 21... Spring pin, 22... Dewatering drive shaft, 23... Bearing, 2
4... Dehydration drive shaft, 25... Case, 26... Bearing, 27... Clutch spring, 28... Gear case, 29... Screw, 30... Cover flange, 31... Dehydration tank shaft, 32... Bearing , 33...
Case cover, 34... Sun gear, 35... Outer ring gear, 36... Screw, 37... Planet gear, 38...
...Upper holding plate, 39...Lower holding plate, 40...
Shaft, 41... Retaining ring, 42... Pulsator shaft, 43... Bearing, 44... Screw, 45... Bottom plate, 46... Nut, 47... Clutch gear, 4
8...Brake shoe, 49...Clutch spring, 50...O ring, 51...Lower coupling, 52...Upper coupling, 53...Outer ring gear, 54...Brake drum, 55...Pin,
56...Brake ring, 57...Lower coupling, 58...Upper coupling, 59...Rib, 60...Brake drum, 61...Recess, 6
2... Protrusion, 63... Brake drum, 64...
Stepped pin, 65...Mounting hole.

Claims (1)

[Claims] 1. A washing drive shaft is provided inside a hollow dehydration drive shaft, and the washing drive shaft has a sun gear at its tip,
A plurality of planetary gears are provided between the sun gear and an outer ring gear disposed around the sun gear, and the planetary gears mesh with the outer ring gear.
A washing drive system is constructed by coupling a pulsator shaft to the planetary gears, a gear case for accommodating and holding the gear group is coupled to the dehydration drive shaft and the dehydration tank shaft to constitute a dehydration drive system, and the gear case is connected to the an upper coupling coupled to a dehydration tank shaft; a cylindrical brake drum having the outer gear integrally formed on its inner circumferential surface and having a brake shoe in sliding contact with its outer circumferential surface;
A driving device for a dehydrating washing machine, comprising: a lower coupling formed integrally with the dehydrating drive shaft. 2. The drive device for a dehydrating washing machine according to claim 1, wherein the upper coupling and the lower coupling have the same shape and size. 3. The dehydrating washing machine according to claim 1 or 2, characterized in that the upper coupling, the brake drum, and the lower coupling are watertightly connected and fixed by mounting fittings such as round bar pins or stepped pins. drive unit. 4. According to claim 1 or 2, a brake ring made of a wear-resistant material with a large coefficient of friction is fixed to the outer peripheral surface of the brake drum, and a brake shoe is in sliding contact with the brake ring. Driving device for a dehydrating washing machine. 5. In claim 1 or 2, the brake drum is formed of synthetic resin, and integrally has projections on its upper and lower end surfaces that are inserted into pin holes provided in the upper coupling ring and the lower coupling ring and bonded by thermocompression. A driving device for a dehydrating washing machine, comprising: 6. In claim 1 or 2, the brake drum is made of a wear-resistant material with a high coefficient of friction;
For example, it is made of rubber-containing plastic, etc.
A driving device for a dehydrating washing machine, characterized in that the brake ring is omitted.